package com.example.demo.controller;

import com.example.demo.common.AppResult;
import com.example.demo.common.ResultCode;
import com.example.demo.config.AppConfig;
import com.example.demo.model.Article;
import com.example.demo.model.ArticleReply;
import com.example.demo.model.User;
import com.example.demo.services.IArticleReplyService;
import com.example.demo.services.IArticleService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.util.ArrayList;
import java.util.List;

@Api (tags = "回复接口")
@Slf4j
@RestController
@RequestMapping("/reply")
public class ArticleReplyController {

    @Resource
    private IArticleReplyService articleReplyService;

    @Resource
    private IArticleService articleService;

    @ApiOperation("回复帖子")
    @PostMapping("/create")
    public AppResult create (HttpServletRequest request,
                             @ApiParam("帖子Id") @RequestParam("articleId") @NonNull Long articleId,
                             @ApiParam("帖子正文") @RequestParam("content") @NonNull String content){

        //1.校验用户状态是否为禁言
        HttpSession session = request.getSession(false);
        User user = (User) session.getAttribute(AppConfig.USER_SESSION_KEY);
        if(user.getState() == 1){
            //返回错误描述
            return AppResult.failed(ResultCode.FAILED_USER_BANNED);
        }
        //2.检验帖子是否存在
        Article article = articleService.selectDetailsById(articleId);
        if(article == null || article.getDeleteState() == 1){
            //返回错误描述
            return AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS);
        }
        //3.校验帖子状态是否正常
        if (article.getState() == 1) {
            //返回错误描述
            return AppResult.failed(ResultCode.FAILED_ARTICLE_STATE);
        }
        //4.构造回复对象
        ArticleReply articleReply = new ArticleReply();
        articleReply.setPostUserId(user.getId());//回复的作者
        articleReply.setArticleId(articleId);//主贴Id
        articleReply.setContent(content);//回复内容
        //5.调用Service
        articleReplyService.create(articleReply);
        //6.返回正确结果
        return AppResult.success("回复成功");
    }

    @ApiOperation("获取回复列表")
    @GetMapping("/getReplies")
    public AppResult<List<ArticleReply>> getRepliesByArticleId(@ApiParam("主贴Id") @RequestParam("articleId") @NonNull Long articleId){

        //校验帖子是否存在
        Article article = articleService.selectDetailsById(articleId);
        if(article == null || article.getDeleteState() == 1){
            //返回错误描述
            return AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS);
        }
        //调用Service获取回复列表
        List<ArticleReply> articleReplies = articleReplyService.selectByArticleId(articleId);
        //校验结果是否为空，为空的话则创建一个空的集合并返回([])，并返回一个字符串形式的null
        if(articleReplies == null){
            articleReplies = new ArrayList<>();
        }
        return AppResult.success(articleReplies);
    }

}
